US20210234202A1 - Secondary battery - Google Patents
Secondary battery Download PDFInfo
- Publication number
- US20210234202A1 US20210234202A1 US16/967,519 US201916967519A US2021234202A1 US 20210234202 A1 US20210234202 A1 US 20210234202A1 US 201916967519 A US201916967519 A US 201916967519A US 2021234202 A1 US2021234202 A1 US 2021234202A1
- Authority
- US
- United States
- Prior art keywords
- electrode plate
- electrode
- secondary battery
- assembly
- outer electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011149 active material Substances 0.000 claims description 14
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 13
- -1 LiCoO2 Chemical class 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910032387 LiCoO2 Inorganic materials 0.000 description 1
- 229910002993 LiMnO2 Inorganic materials 0.000 description 1
- 229910014333 LiNi1-x-yCoxMyO2 Inorganic materials 0.000 description 1
- 229910014832 LiNi1−x−yCoxMyO2 Inorganic materials 0.000 description 1
- 229910003005 LiNiO2 Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0459—Cells or batteries with folded separator between plate-like electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a secondary battery.
- a secondary battery can be charged and discharged, unlike a primary battery that cannot be charged.
- Low-capacity secondary batteries packaged in the form of a pack including a single battery cell are used as the power source for various portable small-sized electronic devices, such as, for example, mobile phones or camcorders, and high-capacity secondary batteries having several tens to several hundreds of battery cells connected to one another are used as the power source for motor drives, such as those in hybrid vehicles.
- Such a secondary battery includes an electrode assembly including a positive electrode and a negative electrode, a case accommodating the electrode assembly, and electrode terminals connected to the electrode assembly.
- the case is classified into a cylindrical type, a prismatic type or a pouch type according to its external shape.
- pouch type secondary batteries may be easily modified in various shapes and may be formed of a lightweight laminate exterior material.
- the present invention provides a secondary battery capable of enhancing safety and test reliability.
- a secondary battery including: an electrode assembly in which a first electrode plate and a second electrode plate are alternately stacked; and a case for accommodating the electrode assembly, wherein the first electrode plate includes an outer electrode plate located at the outermost part of the electrode assembly, and an inner electrode plate located inside the electrode assembly, and the outer electrode plate is smaller than the inner electrode plate and the second electrode plate.
- a difference between a lateral length of the outer electrode plate and a lateral length of the inner electrode plate may range from 0.5 mm to 2 mm.
- a difference between a longitudinal length of the outer electrode plate and a longitudinal length of the inner electrode plate may range from 0.5 mm to 2 mm.
- a plurality of inner electrode plates may be of the same size, and a plurality of second electrode plates may also be of the same size.
- the outer electrode plate may include a first active material layer formed on only one surface thereof facing the second electrode plate.
- At least one end of the outer electrode plate may be located at the same position as or further inward than one end of the inner electrode plate.
- the secondary battery may further include a separator interposed between the first electrode plate and the second electrode plate, the separator extending in a perpendicular direction to a direction in which current collector tabs formed at the first electrode plate and the second electrode plate protrude, and being bent in a Z-shaped configuration.
- a secondary battery including: an electrode assembly in which a first electrode plate and a second electrode plate are alternately stacked; and a case for accommodating the electrode assembly, wherein the first electrode plate includes an outer electrode plate located at the outermost part of the electrode assembly, and an inner electrode plate located inside the electrode assembly, and at least one end of the outer electrode plate is located at the same position as or further inward than one end of the inner electrode plate.
- a difference between a lateral length of the outer electrode plate and a lateral length of the inner electrode plate may range from 0.5 mm to 2 mm.
- a difference between a longitudinal length of the outer electrode plate and a longitudinal length of the inner electrode plate may range from 0.5 mm to 2 mm.
- a plurality of inner electrode plates may be of the same size, and a plurality of second electrode plates may also be of the same size.
- the outer electrode plate may include a first active material layer formed on only one surface thereof facing the second electrode plate.
- the secondary battery according to an embodiment is capable of enhancing safety and test reliability by preventing deformation of the outer electrode plate during thermal compression such that the outer electrode plate located at the outermost part of the electrode assembly is formed to be smaller than the inner electrode plate
- FIG. 1 is a perspective view of a secondary battery according to an embodiment.
- FIG. 2 is a perspective view of an electrode assembly according to an embodiment.
- FIG. 3 is a cross-sectional view of the electrode assembly according to an embodiment.
- FIG. 4 is a plan view of the electrode assembly according to an embodiment.
- spatially relative terms such as “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “on” or “above” the other elements or features. Thus, the exemplary term “below” can encompass both an orientation of above and below.
- FIG. 1 is a perspective view of a secondary battery according to an embodiment.
- FIG. 2 is a perspective view of an electrode assembly according to an embodiment.
- the secondary battery 300 includes an electrode assembly 100 and a case 200 .
- the electrode assembly 100 includes a first electrode plate 110 , a second electrode plate 120 , and a separator 130 interposed between the first electrode plate 110 and the second electrode plate 120 .
- the electrode assembly 100 may be formed by stacking a plurality of first electrode plates 110 and a plurality of second electrode plates 120 .
- the separator 130 may be shaped of a plate and may be bent in a Z-shaped configuration so as to be interposed between the first electrode plate 110 and the second electrode plate 120 to then be stacked.
- the separator 130 may also include a plurality of separators each disposed between the first electrode plate 110 and the second electrode plate 120 , like the plurality of first electrode plates 110 and the plurality of second electrode plates 120 .
- the separator 130 may be formed to be larger than the first electrode plate 110 and the second electrode plate 120 .
- the plurality of first electrode plates 110 may be arranged to be located at the outermost part of the electrode assembly 100 , that is, at the topmost or bottommost parts of the stacked electrode assembly 100 .
- Each of the first electrode plates 110 includes a first electrode current collector 111 formed of a metal foil such as an aluminum foil, a first active material layer 112 located on opposite surfaces of the first electrode current collector 111 and having a first active material coated thereon, and a first uncoated portion 113 not having the first active material coated thereon.
- the first active material may be a lithium-containing transition metal oxide represented by a metal oxide such as LiCoO 2 , LiNiO 2 , LiMnO 2 , LiMn 2 O 4 , or LiNi 1-x-y Co x M y O 2 , where 0 ⁇ x ⁇ 1, 0 ⁇ y ⁇ 1, 0 ⁇ x+y ⁇ 1, and M is a metal such as Al, Sr, Mg, or La, or a lithium chalcogenide compound.
- the first electrode plate 110 may be a positive electrode plate.
- the first electrode plate 110 may include a first current collector tab 114 formed on the first uncoated portion 113 .
- the first current collector tab 114 is formed by being previously cut so as to upwardly protrude when the first electrode plate 110 is formed, and thus is integrally formed with the first electrode current collector 111 . That is, the first current collector tab 114 may be regarded as the first uncoated portion 113 .
- the plurality of first electrode plates 110 are stacked such that the first current collector tabs 114 are superposed at the same position.
- the plurality of first current collector tabs 114 may be welded to one another, and a first electrode lead 115 may be attached to the welded first current collector tabs 114 .
- the first electrode lead 115 may protrude to the exterior side of the case 200 , which will later be described.
- Each of the second electrode plates 120 includes a second electrode current collector 121 formed of a metal foil such as a copper or nickel foil, a second active material layer 122 located on opposite surfaces of the second electrode current collector 121 and having a second active material coated thereon, and a second uncoated portion 123 not having the second active material coated thereon.
- the second active material may be a carbonaceous material, such as crystalline carbon, amorphous carbon, a carbon composite, or carbon fiber, a lithium metal or a lithium alloy.
- the second electrode plate 120 may be a negative electrode material.
- the second electrode plate 120 may include a second current collector tab 124 formed on the second uncoated portion 123 .
- the second current collector tab 124 is formed by being previously cut so as to upwardly protrude when the second electrode plate 120 is formed, and thus is integrally formed with the second electrode current collector 121 . That is, the second current collector tab 124 may be regarded as the second uncoated portion 123 .
- the plurality of second electrode plates 120 are stacked such that the second current collector tabs 124 are superposed at the same position.
- the plurality of second current collector tabs 124 may be welded to one another, and a second electrode lead 125 may be attached to the welded second current collector tabs 124 .
- the second electrode lead 125 may protrude to the exterior side of the case 200 , which will later be described.
- the separator 130 disposed between the first electrode plate 110 and the second electrode plate 120 , prevents a short circuit therebetween and allows lithium ions to move.
- the separator 130 may include polyethylene, polypropylene, or a composite film of polyethylene and polypropylene.
- the separator 130 may extend in a perpendicular direction to a direction in which first current collector tab 114 and the second current collector tab 124 protrude, and may be bent in a Z-shaped configuration to be interposed between the first electrode plate 110 and the second electrode plate 120 .
- the case 200 includes a lower case part 210 in which the electrode assembly 100 is accommodated, and an upper case part 220 coupled to the lower case 210 .
- the case 120 may be divided into the upper case part 220 and the lower case part 210 by bending a middle portion of an integrated rectangular pouch film.
- the lower case part 210 includes an accommodation groove 211 formed by a pressing process to accommodate the electrode assembly 100 , and a sealing part 212 to be sealed with the upper case part 220 .
- the sealing part 212 may be located at one side along which the upper case part 220 and the lower case part 210 are integrated to contact each other, and at the other three sides.
- the case 200 includes two long sides where the upper case part 220 and the lower case part 210 face each other, and two short sides disposed perpendicular to the two long sides and facing each other.
- the first electrode lead 115 and the second electrode lead 125 of the electrode assembly 100 are drawn out through one of the two short side, the one facing the other short side where the upper case part 220 and the lower case part 210 are coupled to each other.
- an insulation member (not shown) may be attached to each of the first electrode lead 115 and the second electrode lead 125 to prevent a short circuit between each of the first and second electrode leads 115 and 125 and the case 200 .
- the electrode assembly 100 and an electrolyte are accommodated in the case 200 to then be subjected to a heat-press process, thereby completing the secondary battery 300 .
- an adhesion force is created between the first electrode plate 110 and the separator 130 and between the second electrode plate 120 and the separator 130 .
- the adhesion force created between the first electrode plate 110 and the separator 130 may range from 200 mN/25 mm to 500 mN/25 mm
- the adhesion force created between the second electrode plate 120 and the separator 130 may range from 130 mN/25 mm to 300 mN/25 mm.
- the adhesion force created between the first electrode plate 110 or the second electrode plate 120 and the separator 130 may be measured using a suitable method known in the art.
- the method for measuring the adhesion force may include, but not limited to, the following method according to Article 8 of the Korean Industrial Standard KS-A-01107 (a test method of an adhesive tape and sheet).
- a separator is cut to have a width of 25 mm and a length of 250 mm, and a tape (Nitto) is adhered to one surface of the separator to obtain a specimen.
- the first electrode plate or the second electrode plate is compressed on the other surface of the separator by reciprocating once a compression roller having a load of 2 kg at a speed of 300 mm/min.
- the specimen is 180° overturned and about 25 mm peeled off, and the separator and the tape on one surface of the separator are fixed into an upper clip of a tensile strength tester, and the first electrode plate or the second electrode plate compressed on the other surface of the separator is fixed into a lower clip and pulled at a speed of 60 mm/min to measure a pressure when the first electrode plate or the second electrode plate is peeled off from the separator.
- FIG. 3 is a cross-sectional view of the electrode assembly according to an embodiment.
- FIG. 4 is a plan view of the electrode assembly according to an embodiment.
- the first electrode plate 110 includes an outer electrode plate 110 A located at the outermost part of the electrode assembly 100 , and the inner electrode plate 110 B located inside the electrode assembly 100 .
- the outer electrode plate 110 A is formed to be smaller than the inner electrode plate 110 B.
- the outer electrode plate 110 A located at the outermost part of the electrode assembly 100 a may include a first active material layer 112 formed on only one surface of the first electrode current collector 111 . That is, the first active material layer 112 makes contact with the separator 130 on the outer electrode plate 110 A and is formed on a surface of the outer electrode plate facing the second electrode plate 120 .
- a plurality of inner electrode plates 110 B located further inward than the outer electrode plate 110 A are formed to have the same size.
- the second electrode plate 120 may be formed to be larger than the outer electrode plate 110 A and may be formed to be of the same size as or be larger than the inner electrode plate 110 B in size.
- the outer electrode plate 110 A may be smaller than the inner electrode plate 110 B and the second electrode plate 120 .
- a plurality of second electrode plates 120 located further inward than the outer electrode plate 110 A are also formed to have the same size.
- the outer electrode plate 110 A located at the outermost part of the electrode assembly 100 is formed to be smaller than the inner electrode plate 110 B and the second electrode plate 120 , the outer electrode plate 110 A located at the outermost part may be prevented from being bent or deformed when the heat-press process is performed after inserting the electrode assembly 100 into the case 200 . That is, the inner electrode plate 110 B and the second electrode plate 120 , which are smaller than the outer electrode plate 110 A and located further inward than the outer electrode plate 110 A, may function as supports, thereby preventing the outer electrode plate 110 A located at the outermost part of the electrode assembly 100 from being bent or deformed during the heat-press process.
- the outer electrode plate 110 A may be more securely supported during the heat-press process.
- the outer electrode plate located at the outermost part is formed to be larger than inwardly located inner electrode plates, the outer electrode plate protruding to the exterior side of the inner electrode plates may be bent to the interior side of an electrode assembly due to a force applied during a heat-press process. Accordingly, there is a potential risk of a short circuit between the outer electrode plate and the second electrode plate, and an error may be detected in the X-ray test performed after the heat-press process.
- the outer electrode plate 110 A plate located at the outermost part is smaller than the inner electrode plate 110 B, X-ray test reliability may be enhanced by preventing deformation of the outer electrode plate 110 A
- a lateral length (W 1 ) of the outer electrode plate 110 A is smaller than a lateral length (W 2 ) of the inner electrode plate 110 B (W 1 ⁇ W 2 ), and the lateral length (W 2 ) of the inner electrode plate 110 B is smaller than a lateral length (W 3 ) of the second electrode plate 120 (W 2 ⁇ W 3 ).
- a longitudinal length (H 1 ) of the outer electrode plate 110 A is smaller than a longitudinal length (H 2 ) of the inner electrode plate 110 B (H 1 ⁇ H 2 ), and the longitudinal length (H 2 ) of the inner electrode plate 110 B is smaller than a longitudinal length (H 3 ) of the second electrode plate 120 (H 2 ⁇ H 3 ). Accordingly, an area of the outer electrode plate 110 A is smaller than that of the inner electrode plate 110 B, and the area of the inner electrode plate 110 B is smaller than that of the second electrode plate 120 .
- the outer electrode plate 110 A is formed to be smaller than the inner electrode plate 110 B and the second electrode plate 120 .
- a difference between the lateral length (W 1 ) of the outer electrode plate 110 A and the lateral length (W 2 ) of the inner electrode plate 110 B may range from 0.5 mm to 2 mm.
- an alignment process margin may be small, so that the outer electrode plate 110 A may protrude more than the inner electrode plate 110 B at some portions.
- the outer electrode plate 110 A may be inordinately reduced in size, resulting in a reduction of capacity of the electrode assembly 100 .
- a difference between the longitudinal length (H 1 ) of the outer electrode plate 110 A and the longitudinal length (H 2 ) of the inner electrode plate 110 B may range from 0.5 mm to 2 mm.
- an alignment process margin may be small, so that the outer electrode plate 110 A may protrude more than the inner electrode plate 110 B at some portions.
- the outer electrode plate 110 A may be inordinately reduced in size, resulting in a reduction of capacity of the electrode assembly 100 .
- the outer electrode plate 110 A is formed to be smaller than the inner electrode plate 110 B, at least one end of the outer electrode plate 110 A may not protrude from the inner electrode plate 110 B even if the outer electrode plate 110 A is pushed in stacking electrode plates. In other words, even if the outer electrode plate 110 A is biased toward one side due to an alignment error during the stacking of electrode plates, one end of the pushed part of the outer electrode plate 110 A may be located at the same position as or further inward than one end of the inner electrode plate 110 B.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020180142844A KR20200058173A (ko) | 2018-11-19 | 2018-11-19 | 이차 전지 |
KR10-2018-0142844 | 2018-11-19 | ||
PCT/KR2019/015565 WO2020105959A1 (ko) | 2018-11-19 | 2019-11-14 | 이차 전지 |
Publications (1)
Publication Number | Publication Date |
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US20210234202A1 true US20210234202A1 (en) | 2021-07-29 |
Family
ID=70773529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/967,519 Pending US20210234202A1 (en) | 2018-11-19 | 2019-11-14 | Secondary battery |
Country Status (5)
Country | Link |
---|---|
US (1) | US20210234202A1 (ko) |
EP (1) | EP3886225A4 (ko) |
KR (1) | KR20200058173A (ko) |
CN (1) | CN111630699B (ko) |
WO (1) | WO2020105959A1 (ko) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US20230101797A1 (en) * | 2021-09-24 | 2023-03-30 | Apple Inc. | Battery cells with tabs at right angles |
US20230107015A1 (en) * | 2021-09-24 | 2023-04-06 | Apple Inc. | Battery cells with tabs at right angles |
US11870100B2 (en) | 2021-09-24 | 2024-01-09 | Apple Inc. | Battery cells with tabs at right angles |
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- 2019-11-14 WO PCT/KR2019/015565 patent/WO2020105959A1/ko unknown
- 2019-11-14 US US16/967,519 patent/US20210234202A1/en active Pending
- 2019-11-14 CN CN201980008728.XA patent/CN111630699B/zh active Active
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Also Published As
Publication number | Publication date |
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EP3886225A4 (en) | 2022-10-19 |
WO2020105959A1 (ko) | 2020-05-28 |
EP3886225A1 (en) | 2021-09-29 |
CN111630699B (zh) | 2023-08-15 |
CN111630699A (zh) | 2020-09-04 |
KR20200058173A (ko) | 2020-05-27 |
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